<template>
    <div class="wrapper">
        <swiper  :options="swiperOptions" v-if="showSwiper">
            <swiper-slide v-for="item of list" :key="item.id">
                <img class="swiper-img" :src="item.imgUrl">
            </swiper-slide>
            <div class="swiper-pagination" slot="pagination"></div>
        </swiper>
    </div>
    
</template>

<script>
export default {
    name:'HomeSwiper',
    props: {
        list: Array
    },
    data () {
        return {
            swiperOptions:{
                pagination:'.swiper-pagination',
                loop:'true'
            }
        }
    },
    computed: {
        showSwiper() {
            return this.list.length 
        }
    },
}
</script>

<style lang="stylus" scoped>
    .wrapper>>>.swiper-pagination-bullet-active //穿透子组件 不受scoped控制
        background :#fff 
    .wrapper
        overflow:hidden
        width:100%
        height:0
        padding-bottom:31.25% //相对于宽度的31.25%
        background #eee   
        .swiper-img
            width:100%
            height:31.25vw
</style>